Injection piping for internal-combustion engines with solid-fuel injection



May 13, 1930. J. MAHLER INJECTION PIPING FOR INTERNAL COMBUSTION ENGINES WITH SOLID FUEL INJECTION Filed April 11, 1925 IFYLI'EHZLUP W, Mb

Patented May 13, 1930 I PATENT 1 m-F1E Jomu EARLIER, on auosnuae, Guam, assmnon 'ro, ran-"rum: mscizmnm.

mean: Auosntmo-Nunmime, ax'rmnensnnnscaar'r, on anosnuae, enauamr, a 'conronn'rron on enema-Y mmor1on mm iron i mmmtew mumems wirn soLin-rUnL mmcrron Application filed Aprll 11 was, Serial No. 22,315, and m Germanyflay a4, 191:4.

In internal combustion engines operating with solid fuel injection and which are v erned by a relief valve, and in which the de very valve is fitted in the injection piping, this delivery valve is generally separatedLfrom the fuel pump either by a greater or lesser distance. Th s delivery valve has aspecial dut to perform upon interruption. of the fue pump pressure stroke, as the overflow of the compression or explosion pressure from the cylinder into the suction part of the fuel pump must be avoided; otherwise the en 'ne is put out of service. But it must be ta eninto consideration that even with the very best workmanship and most careful attention, there is always the possibilit that this valve might suddenly become de ective'and cause interruptionin working, which is espc'-.

.c'ially annoying with non-stationary motors because it causes great inconvenience to re-' I set the valve while the vehicle carrying the motor is 'in use upon the track or road, and in addition occupies too much time. With marine motors, the conditions are similar, as a stop-must be avoided. In this invention, I it has been endeavoured to construct the valve in such away that the valve and its seating can be easily taken out of the valve casing achieve by having the bod'yof the valve seating readily removable and interchan eable in a sleeve which is connected with t e fuel pump and guided in a bore of the valve 7 casing and detachable with the'latter." As

compared with the hithertoknown valves,

' this construction has the further advantage when the screw cap and can be replacedby spare parts which are perfectl "ground and readyfor use. This is "The valve'seating Fa is fitted looselyinto the cylindrical bore of'the sleeve c which is arranged ina piping [2 connecting the fuel pump .m to the cylinders n. 1 The sleeve 0 fits loosel into the cylindrical bore of the valve casing a'ndis connected with this b a screw cap .e. The body ofthe valve seat a is made oil-tight by means of packing rings ff, which are fitted on both sides" of a flange a :""on the body of the valve seating and are compressed by the sleeve 0,

e is tightened to efiect. operative connection. The valve g isguidcd in the valve boreh? and keptlon. its seating .by aspiral spring 6. ""j andk are two delivery pipes leading from the valve casing to the injection nozzles of the cylinders.

The under art of the bore h. of the valve seating is for shaped, and is in connection with a circular channel Z of the valve body,"

which is definedby the rims l and Z? which together with the inner bore of the sleeve c serve as a strainer for the fuel.

In order to replace a damaged valve, the screw cap e is'loosened and unscrewed from the valve casing fd, then the sleeve 0 with the valve seating,a, and the v"valve 'g are withdrawn fromthe valve casing d b bendthepipe b and the valve seat wit valve 9 therein may be readily and quickly re-- moved and exchanged for another valve seating and valve unit,which may beasreadily inserted in place after which the screw cap ,e.may be sore ed back upon the member d to connect t iefparts again in operative connection. i

Having now described and ascertained the nature of my said invention, I declare that what I claim is:

1. A delivery valve structure adapted for connection in the injection pipingof an internal combustion engine and constructed for ready assembly or disassembly in themaking of replacementsof the valve seat and valve,

comprising a pair of complementary members I adapted tolbe connected together and each adapted tobe connected to a portion of said injection piping to be supported thereby, a

valve seat member removably mounted be a valve within the valve seat member, said valve seat member having a lip therearound and a groove in the said member adjacent said lip and in communication with the forked portion of the saidbore, said lip being spaced from the wall of the bore of the said sleeve to form a filter ,for the fuel pass ing from the piping throughthe bore of-the. said sleeve into the forked portion of the bore of the valve seat member.

3. 'A delivery valve-structure adapted for 1 connection to the injection piping of an in- .ed within the two saidal-igned bores, a valve ternal'combustioirengine and constructed for ready assembly or disassembling in the making of replacements of the valve. seat and valve, comprising a valve casing member having a bore therein, a sleeveremovably mounted within the bore of said valve 'casing member, said sleeve having a bore therein, a valve seat member removably mounted within the bore of said sleeve, a valve associated with said valve seat member, and detachable means for clamping the sleeve member within the valvecasing member for detachably coupling the whole in assembled relation to provide a readily detachable oiltight construction. j

.4. A delivery valve structure adapted for connection to the injection piping of an internal combustion engine and constructed for ready assembly or disassembling in the making of replacements'and'the like of the valve seat {and valve, comprisin a valve casing member having a bore therein, said valve casing member being adapted for connection to one portion of the injection piping, a sleeve slidably and removably mounted within the bored said valve casin member, and having a bore therein connecte to and in alignment with the-bore of the valve casing member, said sleeve being ada ted for connection to an-' other portion of t e injection piping, a valve seat member slidably and removably mount mounted within said valve seat member, and

clamp the valve seat member and valve mounted therein in operative position.

detachable means for connecting the valve caslng member and the sleeve together to 5. A readily attachable and detachable delivery valvestruc ture adapted for connection to the injection piping of an internal combustion engine, comprising a valve seat ing-including separa parts, a pipe connecting said pump with one' assemble and valve unit composed of high-class material, an enclosing structure including a pair of telescopic members not subject to wear durin operation-composed of lower-grade material, and means for'detachably clamping said valve seat and valve unit in operative position within said enclosing structure.

6. In an internal combustion engine of the character described, and in combination, a cylinder, a fuel pump a delivery valve housble readily detachable of the parts of said valve housing, a pipe connecting another of said parts of said valve housing with said. cylinder, and a removable delivery valve seat and delivery valveoperatively positioned within said valve housin 7. Apparatus of the character descri ed, comprising in combination, a cylinder of an internal combustion engine, afuel-pump feeding the cylinder, injection piping leading from the fuel pump. to the cylinder, a valve fitting including separable readily detachable parts interposed intermediate the ends of the piping and supported thereby, and a delivery valve within said fitting for 'controlling the flow through said piping.

8. In a multi-cylinder internal combustion engine of the character described, and in coinbination, a fuel pump feeding a plurality of cylinders, piping leading from the fuel pump to the cylinders, a single delivery valve in 'said injection piping controlling the flow through said piping, and a valve fitting for the delivery valve comprisin interfitting each leading toone of the pluralityof cylinders, a removable valve seating carrying the delivery valve removably mounted wlthin said interfitting parts, and means for detachably cou ling the said interfitting parts in g relation to provide a readily assembled oil-tight construction.

9. In an internal combustion engine of the character described, the combination with a cylinder; of a fuel pump feeding the cylinder, an injection piping leading from the pump to the cylinder, a delivery valve controlling the fiow through the piping, and a fitting in said piping providing both a valve filftizlflg for the delivery valve and a filter for I t e uel passing through the injection piping to the cy inder.

10. In a multi-c linder internal combustion engine of the c aracter described, and in combination, a fuel pump feeding a pluralit of cylinders, a delivery valve houslng inclu ing separable readily detachable parts, a pipe connecting said pump with said valve housing, piping'connecting said valve housing to a plurality of cylinders, and a single delivery valve seat and delivery valve removably parts slidably mounted one wit in the other,

mounted within'said detachable valve housing for controlling flow through the piping to the plurality of cylinders.

11. A delivery valve structure adapted for connection in theinjection pipingof an internal combustion engine for controlling the flow through the piping, comprising a fitting in said piping including detachably coupled interfitting parts, a removable valve seating carrying the delivery valve contained within said interfittingparts, one 'end of the valveseating remote from the valve being provided with ribs and an intervening groove which together with the inner wall of one of v the enclosing parts form a filter for the fuel passing through the piping.

12. For use with an internal combustion engine of the character described, a delivery valve structure for controllin the flow of fuel to the engine, --comprismg a fitting formed of? detachably coupled interfitting parts, a removable valve seating carrying a delivery valve enclosed within said interfitting parts, the valve seating cooperating with the inner wall of one of the enclosing parts to provide an annular restricted passage serving to filter the fuel passing through the piping.

13. A delivery valve structure adapted for connection in the injection piping of an inp ternal combustionengine and constructed for ready assembly and disassembly'in the making of replacements of the valve seat and va ve, comprising a valve casing member having a bore therein and adapted for connection to one portion of the injection piping, a sleeve adapted for connection to another portion of the injection piping and slidably and removably mounted within the bore of said valve casing member, said sleeve having a bore therein in alignment with the bore of said Valve casing member, a valve seat member slidably and removably mounted within the said aligned bores, a valve mounted within the valve seat member, a flange on said valve seat member slidably engaging the valve casing member beyond the end of said sleeve, packing means positioned on both sides of said flange, and detachable coupling means for fastening the interfitting parts together to com ress the packing to form a readily assemble oil-tight construction.

In testimony whereof I have aflixed my signature.

JOHANN MAHLER. 

